Two design approaches sensitive photodetectors are: (i) using
photogenerated electron/hole pairs in the
base of a BJT; and (ii) using a reverse-biased pn junction
operating in the avalanche regime. In point
form, summarize the strengths, weaknesses and similarities of these
designs.
1-why the mobility of electron is higher than hole?
2-why effective mass of hole is greater than electron?
3-why are holes heavier than electrons?
4- Explain effective mass for electron and hole?
1-why the mobility of electron is higher than hole?
2-why effective mass of hole is greater than electron?
3-why are holes heavier than electrons?
4- Explain effective mass for electron and hole?
(a)
Describe what the Hall Effect consists of, (b) A rectangular copper
strip 1.5 cm wide and 0.10 cm thick. carries a current of 5.0 A.
Find the Hall voltage for a 1.2-T magnetic field applied in a
direction perpendicular to the strip.
I will like if correct
Each of the following means of physical
control, describe the action on the cell, its
effect on the cell (be very specific – what does
it do to vital parts or chemicals within the cell), and give a
detailed specific example of its use in
controlling microbes. I want detail – do a good job or lose
points.(5 points)
Autoclave
Boiling
Pasteurization
Radiation: both UV light and
ionizing radiation
Cold (Refrigeration and freezing)
Is there any free electron or hole in silicon crystal at
absolute zero (0K)? Why?
Is there any free electron or hole in silicon crystal at room
temperature? Why?
What is thermal generation? What is recombination?
What is bandgap energy?
What is the bandgap energy of Silicon and diamond,
respectively?